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Class type Netcgi.cgi_environment


class type cgi_environment = object .. end
The environment of a request consists of the information available besides the data sent by the user (as key-value pairs).

CGI properties

The following properties are standardised by CGI. The methods return "" (or None in the case of the port number) when the property is not available.

method cgi_gateway_interface : string
method cgi_server_name : string
method cgi_server_port : int option
method cgi_server_protocol : string
method cgi_server_software : string
method cgi_request_method : string
We recommend you to use the method Netcgi.cgi.request_method which is more type-safe and informative.
method cgi_script_name : string
method cgi_path_info : string
method cgi_path_translated : string
method cgi_auth_type : string
method cgi_remote_addr : string
method cgi_remote_host : string
method cgi_remote_user : string
method cgi_remote_ident : string
method cgi_query_string : string
This is the row query string. The Netcgi.cgi class gives you an easy access to the arguments through the #arg... methods.
method protocol : Nethttp.protocol
The server protocol in a decoded form. It can be either
  • `Http((major,minor),attributes) or
  • `Other.

method cgi_property : ?default:string -> string -> string
Returns a (possibly non-standard) CGI environment property. If the property is not set, Not_found is be raised unless the default argument is passed. The default argument determines the result of the function in this case.

The method takes the case-sensitive name and returns the value of the property. Usually, these properties have uppercase names.

For example, cgi_gateway_interface returns the same as

        cgi_property ~default:"" "GATEWAY_INTERFACE" 

You cannot access the fields coming from the HTTP header. Use the method input_header_field instead.

method cgi_properties : (string * string) list
Return all properties as an associative list.
method cgi_https : bool
A well-known extension is the HTTPS property. It indicates whether a secure connection is used (SSL/TLS). This method interprets this property and returns true if the connection is secure. This method fails if there is a HTTPS property with an unknown value.

Header of the incoming HTTP request.

method input_header : Netmime.mime_header
The whole HTTP header.
method input_header_field : ?default:string -> string -> string
#input_header_field ?default f returns the value of a field f of the HTTP request header. The field name f is case-insensitive; if the name is a compound name, the parts are separated by "-", e.g. "content-length". If there are several fields with the same name only the first field will be returned.
Raises Not_found if the field does not exist, unless the default argument is passed. The default argument is the result of the function in this case.
method multiple_input_header_field : string -> string list
Returns the values of all fields with the passed name of the request header.
method input_header_fields : (string * string) list
Returns the input header as (name,value) pairs. The names may consist of lowercase or uppercase letters.
method cookie : string -> Cookie.t
#cookie cn returns the cookie with name cn.
Raises Not_found if such a cookie does not exists.
method cookies : Cookie.t list
Returns the list of valid cookies found in the request header. Here "valid" means that the decode function does not raise an exception.
method user_agent : string
This is a convenience method that returns the "User-agent" field of the HTTP request header.
method input_content_length : int
Returns the "Content-length" request header field.
Raises Not_found if it is not set.
method input_content_type_string : string
Returns the "Content-type" request header field as a plain string or "" if it is not set.
method input_content_type : unit -> string * (string * Mimestring.s_param) list
Returns the parsed "Content-type" request header field.
Raises Not_found if it is not set. See also Mimestring.scan_mime_type_ep.

Response header

method output_header : Netmime.mime_header
The whole HTTP response header
method output_header_field : ?default:string -> string -> string
Returns the value of a field of the response header. If the field does not exist, Not_found will be raised unless the default argument is passed. The default argument determines the result of the function in this case.

If there are several fields with the same name only the first field will be returned.

The anonymous string is the name of the field. The name is case-insensitive, and it does not matter whether it consists of lowercase or uppercase letters. If the name is a compound name, the parts are separated by "-", e.g. "content-length".

method multiple_output_header_field : string -> string list
Returns the values of all fields with the passed name of the repsonse header.
method output_header_fields : (string * string) list
Returns the output header as (name,value) pairs. The names may consist of lowercase or uppercase letters.
method set_output_header_field : string -> string -> unit
Sets the value of a field of the response header. The previous value, if any, is overwritten. If there have been multiple values, all values will be removed and replaced by the single new value.
method set_multiple_output_header_field : string -> string list -> unit
Sets multiple values of a field of the response header. Any previous values are removed and replaced by the new values.
method set_output_header_fields : (string * string) list -> unit
Sets the complete response header at once.
method set_status : Nethttp.http_status -> unit
Sets the response status. This is by definition the same as setting the Status output header field.
method send_output_header : unit -> unit
This method will encode and send the output header to the output channel. Note that of the output_channel is `Transactionnal (as opposed to `Direct), no output will actually take place before you issue #commit_work() -- thus a #rollback_work() will also rollback the headers as expected.

The output channel transferring the response

method output_ch : Netchannels.out_obj_channel
Deprecated.Use #out_channel instead.
method out_channel : Netchannels.out_obj_channel
The "raw" output channel. In general you should use instead Netcgi.cgi#out_channnel which supports transactions (if you choose to). Access to the "raw" channel is useful however, for example for sending images or download of files (for which transactions are not interesting but merely more work).

Logging

method log_error : string -> unit
#log_error msg appends msg to the webserver log.

Miscellaneous

method config : config
The configuration of the request.
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